Exercise device



FIG. 1 is a perspective view of an exercise device;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.

The broken lines illustrate portions of the exercise device which form no part of the claimed design. 

The ornamental design for an exercise device, as shown and described. 